Hybrid-Excited Permanent Magnet-Assisted Synchronous Reluctance Machine

Abstract

This paper presents the results of simulation tests of a unique hybrid-excited permanent magnet machine operating in in different working regimes. The common feature of analyzed machine is a presence of magnetic barriers in the rotor structure. Structurally, this machine combines the advantages of the PMa-SynRM machine (Permanent Magnet-assisted Synchronous Machine) and a wound synchronous machine. The paper presents, among other results, the voltage and torque characteristics as a function of the current in the stator and the additional DC control coil. Selected results of experimental studies are also shown.

Overview of Hybrid Excitation in Electrical Machines

“…Rather than seeing hybrid excitation as a combination, there is also an alternative approach that considers one as a support of the other, where either the PM or the FW is considered the main source of excitation and the other excitation only acts as an additional support. One such approach considers the field winding as the main source with the assistance of permanent magnets [26][27][28]35,36], whereas the opposite strategy considers the PM as the main source with additional support from the FW [24,25].…”

“…The other main design of basic magnetic circuits is to place the PMs in parallel with the FWs. This type of design is often called "PM assisted WRSM", where the PMs are seen as a support for the FWs [35,36,89].…”

“…where the area can be designed to establish a saturation flux (φ s ) for a desired field current (assumed to be at max φ FW (I FW )). [36], and Pang et al [92]. A common solution is to place the PM beside the air gap similar to a PM bridge between the surfaces of two classical FW poles.…”

Low-speed permanent magnet generator for use in a compact wind turbine

“…Many other unconventional machines can also be used in wind turbines. These include axial flux machines (Paplicki et al, 2022), transverse flux machines (Kang and Weh, 2008) or hybrid excited machines (Wardach et al, 2018(Wardach et al, , 2019(Wardach et al, , 2020(Wardach et al, , 2022. In recent years, the popularity of hybrid excited machines has been growing strongly.…”

“…Their disadvantage is the complicated design and high price, which is a strong negative argument in the case of small turbines with a vertical axis of rotation. These constructions can be divided into several types: with a split electromagnetic circuit (Wardach et al, 2018(Wardach et al, , 2019, with a combined electromagnetic circuit (Wardach et al, 2022) and machines with a claw-pole topology (Wardach, 2018).…”